如何在Talend中使用Java类
我有以下三个类：我尝试制作1和2的例程，并使用tjava从1和2调用主类和方法，但我无法获取这些方法。
1）
package page_scraper; import com.gargoylesoftware.htmlunit.Page; import com.gargoylesoftware.htmlunit.WebClient; import com.gargoylesoftware.htmlunit.WebClientOptions; import com.gargoylesoftware.htmlunit.html.FrameWindow; import com.gargoylesoftware.htmlunit.html.HtmlButtonInput; import com.gargoylesoftware.htmlunit.html.HtmlElement; import com.gargoylesoftware.htmlunit.html.HtmlOption; import com.gargoylesoftware.htmlunit.html.HtmlPage; import com.gargoylesoftware.htmlunit.html.HtmlSelect; import com.gargoylesoftware.htmlunit.html.HtmlTextInput; import java.io.FileWriter; import java.io.IOException; import java.io.PrintStream; import java.io.Writer; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.List; import page_scraper.UnitArray; public class PageScraper { public void Scrape() throws IOException { try { UnitArray object = new UnitArray(); ArrayList unitList = object.getUnitArray(); WebClient webClient = new WebClient(); webClient.getOptions().setThrowExceptionOnScriptError(false); webClient.getOptions().setThrowExceptionOnFailingStatusCode(false); HtmlPage page = (HtmlPage)webClient.getPage("http://www.bmreports.com/servlet/com.logica.neta.bwp_PanBMUData"); List frames = page.getFrames(); HtmlPage page1 = (HtmlPage)((FrameWindow)frames.get(0)).getEnclosedPage(); HtmlTextInput settlementDay = (HtmlTextInput)page1.getHtmlElementById("param5"); HtmlSelect period = (HtmlSelect)page1.getHtmlElementById("param6"); HtmlOption periodOption = period.getOption(1); HtmlTextInput unitId = (HtmlTextInput)page1.getHtmlElementById("param1"); HtmlButtonInput button = (HtmlButtonInput)page1.getHtmlElementById("go_button"); String outputLocation = String.valueOf(System.getProperty("user.home")) + "/Documents/output.csv"; FileWriter fileWriter = new FileWriter(outputLocation); String errorLocation = String.valueOf(System.getProperty("user.home")) + "/Documents/error.csv"; FileWriter errorWriter = new FileWriter(errorLocation); int i = 0; while (i < unitList.size()) { int x = 0; while (x < 365) { String errorData; SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); cal.add(5, - x); String dateValue = dateFormat.format(cal.getTime()); System.out.println(dateValue); settlementDay.setValueAttribute(dateValue); period.setSelectedAttribute(periodOption, true); unitId.setValueAttribute(unitList.get(i)); System.out.println(unitList.get(i)); try { button.click(); HtmlPage page2 = (HtmlPage)((FrameWindow)frames.get(1)).getEnclosedPage(); String pageSource = page2.asXml(); int firstIndex = pageSource.indexOf("csv=") + 38; int secondIndex = pageSource.indexOf("n\"") + 1; String csvData = pageSource.substring(firstIndex, secondIndex); fileWriter.append(csvData); } catch (ClassCastException e) { errorData = String.valueOf(dateValue) + " " + unitList.get(i) + System.getProperty("line.separator"); System.out.println(errorData); errorWriter.append(errorData); continue; } catch (StringIndexOutOfBoundsException e) { errorData = String.valueOf(dateValue) + " " + unitList.get(i) + System.getProperty("line.separator"); System.out.println(errorData); errorWriter.append(errorData); continue; } ++x; } ++i; } webClient.close(); fileWriter.close(); errorWriter.close(); } catch (IOException e) { e.printStackTrace(); } } } 2）
package page_scraper; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; public class UnitArray { public ArrayList getUnitArray() { String csvList = "abc,xyz"; ArrayList list = new ArrayList(Arrays.asList(csvList.split(","))); return list; } }
3）
package page_scraper; import page_scraper.PageScraper; public class main { public static void main(String[] args) throws Exception { PageScraper test = new PageScraper(); test.Scrape(); } }
我在Talend中为上面的代码（1）和2）制作了例程，然后使用tjava来调用方法，但是无法这样做。我也尝试使用tjava，并在每个tjava上执行onSubjob ok。 如何在talend中调用这些类并调用该方法？
首先，Talend中的例程类需要在例程包中
package routines; public class PageScraper { public void Scrape() { System.out.println("PageScraper.Scrape"); } }
其次，要在Job中使用它，你需要将常规拖到打开的工作区域。 
然后你可以用这种方式使用你的课程 
你可以轻松制作一个包含三个类的jar文件，然后使用tLibraryLoad加载jar，或者如果你想获得更多的可重用性，可以在你的例程中包含jar。